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【单选题】
引入负反馈后放大电路的放大倍数（ ）。A.
变大
B.
变小
C.
不变
D.
不确定
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反馈参考答案：
举一反三
【单选题】75 She was so fat that she could only just __ through the door.
A.
assemble
B.
appear
C.
squeeze
D.
gather
【简答题】She
is so fat that she has to go on a _______.A. dinner B. meal C. drink D. diet
【单选题】Susan was fat last year. So she decided more exercise. Now she is much more beautiful.
A.
take
B.
to take
C.
taking
D.
took
【单选题】She was so fat that she could only just through the door.
A.
assemble
B.
appear
C.
squeeze
D.
gather
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